Press



Feb. 20, 1923,

0. 1E. COOK.

PRESS.

FILED OCT. 21,192!- 4 SHEETS-SHEET lgen-612v": OraZZeZ 0M 42 4 4111;

Feb. 20, 1923.

' 0. E. COOK.

PRESS.

FILED OCT. 2|. 1921. 4 SHEETSSHET 2,

Feb. 20, 1923.

4 SHEETS-SHEET 3.

PRESS FILED OCT. 21,1921.

I nzzeni'ovb- Patented Feb. 2%, 1923,

aura srras onvILLn E. COOK, or raor, new YORK, ASSIGNOB To ensure",rnABoD Y, &

or racy, new YORK, A conronn'rron or new YORK.

rnnss.

Application filed )ctober 21, 1921.- Serial No. 509,321.

To all whom 2'25 may COTLGGW/t.

, Be it known that I, OnvILLn E. Coon, a

citizen of the United States, and resident of Troy, in the county ofRensselaer and State of New York, have invented new and usefulImprovements in Presses, of which the following is a specification.-

This invention concerns presses of that type wherein the materialoperated upon is subjected to heat during the pressing operation andrelates more particularly to mechanisms'of this general character suchas are employed for folding and pressing collar and cuff blanks.

When a presser element, as for example the bed plate, of such a machineis electrically heated, a considerable degree of care on the part of theoperator is necessary in order to avoid overheating of the machine, particularly during intervals, of idleness. The object of the presentinvention is to provide automatically acting means for controlling thesupply of heat to the machine whereby chronism.

overheating of the presscr element or elements may be avoided at alltimes, whether v I p v the taken'of the presenceof operating mechor notthe machine is being operated.

As one mode of attaining this object, a switch may be provided in theheatingcircuit, such switch being operably connected to one oi the workclamping or pressing elements, as for example the die plate wherebymovement of the latter to and from ope. erative position serves to closeor open the switch. The closing of the switch may serve to initiate theflow of current through the heating coil, but preferably is so arrangedas to short circuit a reactancc or resistance coil in such circuitthrough which a prede termined amount of current is constantly passed tothe heating coil. With this latter arrangement, the reactance may be socalculated as to provide the precise amount of heat at the presserelement necessary to bring the latter to the working temperature and toovercome radiation losses. The short circuiting of the'reactance duringthe operation of the die plate may then serve to sup ply the additionalheat necessary to rep-lace that carried away by the material at eachoperation. In this way, heat supplied in excess otthat necessary to'maintainthc normal working temperature of the presser is application ofthe present invention. the patented mechanlsm. the mo-vable work.

proportional to thespeed ofoperation of the Thus, overheating of themapecial care upon "the part of the operatoris required inma intain'ingthe desired-working temperature. Y i i The folding and pressingmechanism disclosed inthe patent to Brown 1,053,477, Feb. 18, 1913,lends'itself particularly well to the In engaging elementispneumatically actuated, the admission andexhaust-0f air fromxthepneumatic cylinder. being under control of a manuallyactuable valve. 1applying the present invention to such an apparatus, itis necessarymerely to provide a pneumaticmotor for opening-and closing the switchabove referred to and to connect such motorwith the feed pipe Ofllllfiactuating cylinder for the die plate. plate and switch necessarilyoperate'in syn- While as above stated, advantage may well anism such asdisclosed in the above patent for securing synchronism'of operation ofthe die plate and switch, it is clearly apparent that electrical ormechanical connec tions might readily be devised whereby to secure thesimultaneous actuation of said parts and it iscontemplated that sucharrangements may be utilized as circumstances might make expedient.

In. the accompanying drawings there is illustrated'an arrangement ofparts well, exemplifying means whereby the above obectmay be attained,and in such drawings, y

l? 1 IS a transverse vertical section through a foldlng and pressingmachine of usual type, illustrating the device of the present inventionas applied thereto;

"Fig. 2 is across section tolarger scale illustrating the device of thepresent invention removed from the machine, such sec tion being taken ona line such as (5-7) of llirr 1- a 1 a h' a (Z thereof As thus arrangedthe die the arrangement of the electric connections; Fig. is afragmentary elevation to smaller scale illustrating the device of Fig.2, the rear cover member thereof being removed; and

Fig. 6 is a view similar to Fig. 3 but illustrating a modification T hemachine to which the present inver tion is shown as applied is of thegeneral type more fully illustrated and described in the aforementionedpatent to Brown, to which patent reference-may be had for a tullerdisclosure of the details thereof. As hereinillustrated the machinecomprises a frame having legs 1, adjacent legs being united by means oftransverse'bars such as 2. The machine comprises cooperating workclamping elements of which one is constituted by the'usual bed plate 3having an upper surface of heat conducting material upon which the blankrests during the pressing operation. This bed'plate as herein disclosedprovided with chambers a in which are located electrically energizedheating coils 5. These coils may be of any usual type and are providedwith terminals (3. 6' below the bed plate. During the operation, thework is clamped between the bed plate 3 and the die plate Tcarried uponthe end of the lever arm 8. The lever arm 8 is pivoted at the point 9upon a bracket 10 fixed to the machine frame. A depending arm 11 isfixedly secured to the lever arm 8, being integraltherewith. it desired.To the lo \ver end of such arm is connected a spring 12 whose oppositeextremity is secured at 12-3 to the machine frame. The action of thisspring is such as normally to retain-the die plate 7 in elevatedposition as indicatedin Fig. 1. F or depressing'the member 7 intooperative posit-ion whereby to press material. against the bed plate 3,a piston 1 L is provided, such piston sliding in a cylinder 15 to which.air or other pressure fluid may he admitted through a pipe 16. A; pipe17 connects the pipe 16 with a valve box 18 having therein a rotaryvalve whose stem is indicated at- 19. This valve may be of the typeshown in the above noted patent, to which reference may be had tor thedetails thereof.

SGCUIQCl to the valve stem 19 is an arm 20, to the outer extremity ofwhich is pivotally secured. the connecting rod 21. The lower end of therod 21 is connected at 22 to the rear end of a treadle lever 23. Thetrcadle lever is pivoted at 24; to a bracket 25 secured to the finaleoi" the machineand is provided. at its forward extremity with a footengaging portion 26. A. spring 27 is secured at to'the upper portion oftheconnecting rod 21 and is attached at its lower end 29 to the frame.The spring as thus arranged tends to hold the 'treadle; 1e crintheposinciicatje'd iii-Fig. 1. The pipe 3O'a dmits pressure fluid to thevalve box 18 and the valve is so constructed that upon depression of thetreadle member 26 by the toot oi the operator air is admitted throughthe pipes 1'? and 16 to the cylinder 15, thus causii'ig the piston 1% toact against the arm 11, thereby swinging the lever arm 8 in a clockwisedirection and bringing the die plate 7 into operative position ofcooperation with the bed plate.

Referring to Figs. 2 and 3, there is indicated a support. 31 in the formof a lJOX or hollow casing. such casing being provided with one or morehook members 32 whereby it may be suspended from one 0% the transverse 2o't'the frame. Within this casing are arranged a pair of similar resistance or reactance coils 313 such coils being formed upon suitablylaminated cores o.-l-. Secured within the casing is an insulating block35 having mounted thereon a pair of spaced resilient arms such as 36.each of such arms being furnished at its free e:; tremity with a contactshoe 3?. A. second block 38 is secured to the face or? said first blockand to such block are attached a pair oi resilient arms 39. such armshaving contact shoes all at their tree extremities. The shoes 37, 40 asthus arranged constitute two pairs of cooperahl contact elements. Oneterminal ll oi one of the coils 33 is connected to a binding postelectrically connected to one of the arms 36, while the other terminal43 of such coil is connected to a binding post which is electricallyconnected to the corresponding arm in the same manner the terminal 4L5of the other coil 33 is secured to the binding post 4L6 electricallyconnected to the other of the arms 36, while the other terminal 4:? ofsuch coil is secured to the binding post 4:8, electrically connected tothe opposed arm 39. From the posts 42, 4:6 conductor wires li 4-6 leadto the terminals 6. (a ot the respective heater coils. while tram thepos all. 48 extend conductor wires 61 leading to any convei'iient sourceoi electrical energy. The other terminals (not shown) oi the heatercoils are directly co nected o conductors such as (30. also leadingtosuch source of energy.

The opposite wall of the casing From that having the books 32 may hercinoval'ile it desired and to such wall is secured a cylinder 49, suchcylinder being provided with a. flange 50 which bears against the sidewall of the casing. the flange being provided with openings throughwhich pass bolts fit by means of which the flange is secured to thecasing. Within the cylinder is a piston 52 provided with a suitablepacking 53 and having a piston rod 54 which extends through an openingat 56 in the side wall of the casing.

A coil spring 5'? encircles the piston rod.

Hit

'lOl bearing at one end against the. piston and at the other against theouter surface of the casing, this spring normally acting to retain thepiston in the outer end of the cylinder. A pipe 58 enters the outer endofthe cylinder and is arranged for connection to the pipe 16 abovereferred to, whereby pressure fluid may be admitted from the pipe 16into the cylinder 49. Secured to theinner end of through the reactancecoil 33,wires-4i-1 and 42 thence through the heating coil 5, and to thereturn wire 60. The reactant-e coil is of such dimensions that thecurrent per mitted to pass through the coil 5 is just sutficient to heatthe bed plate 3 to the desired working temperature and to maintain it atsuch temperature so long as the machine is not in operation. When,however. the die plate 7 is brought down upon worlr placed upon the bedplate 1n the manner previously described, pressure fluid from the pipe16 is admitted through the pipe 58 to the cylinder I 49. The piston 52is thus actuated to carry j the block 59 into contact with the arms 39.

This brings the blocks 40 into contact'with the shoes 37, thereby shortcircuiting or shunting the reactance coil This permits current ingreater quantity to pass through the coil 5 whereby the heat imparted tothe bedplate is substantially increased. This increase in heat issufiicient to make up for that carried away at each operation by thematerial operated upon. The current is thus PGIIIHt-tQCl to flow 1naugmented quantity during the pressing operation but immediately uponrelease of the treadle member. the

pressure is exhausted from the pipe 16 and simultaneously from thecylinder 25:9. The spring 57 immediately retracts the piston 52,carrying the contact member 40 away from the member 37. thus againcutting in the reactance coil 33 thereby reducing the current throughthe heating coil-to the normal amount. With this arrangement it iscvident that there is littleprobability of overheating ofthemacl1ine,'the normal heutsuppliedlheing merely sutficient to overcome?radiation losses.

increased amount of heat necessary to make It is also clear that the upfor that absorbed by the material is only supplied during the pressingoperation and stantially proportional ated by mechanical or electricalIDGELIIS.

is entirelydependent upon the movement of the die plate 7 into operatingposition. Such.

surplus heat, therefore, is supplied in direct ratio to the duration of.each'pressingopere' at on, and as" successive operations nor-v mallyconsume substantially equal amounts of 6511116, theadded heat thussupplied is suberation of the machine :sothat carelessness orinattention on the part of the operatoris of little consequence, so faras the matter of overheating of the parts is concerned. 9

VVhilethe device herein above, described comprises duplicateflheatingcoils in the bed plate I and duplicate; switches and reactancecoils',.it is'to be understood' .that.a' greater-v or lesser, number ofsuch devices might well be employed if occasionshouldso require."

It is also to be understood that while the coil 33 has been referred toas a reactance (IOIl, a resistance-coil might be substltuted to thespeed of op- 1 i therefor if direct current were tobe em ployed for theheatihg,coil.,, ltPis also evident that while the arm. 8 and the. switchclosing block 59have been shown assimul taneously operable "by pneumaticmeans, other pressure fluid might be employed for actuating them andthat solar "as the broad.-

er aspects of thefinvention are concerned,

such elements might be simultaneously actu- One mode of actuatin theswitch: 7 chanloally s indicated in 6-where1n the I cas1ng-70 18provided w th the attaching hook '71 and has mounted within it the in-{su'lating blocks "72, Carried by these blocks are the-res lient arms.74, 75: provided with the contact shoes '76, :77, re

spcctively. Passing through an opening 737*? in the front Wall ofthe-boxor casing 7.0 is ae-lever i 8, such lQVQIXbBlHg pivoted atfi79.

between'a pair of ear'sSO, one only oisuch' i ears being shown. Thislever extends nto tlie-,-casing and.1s bent at 81 and'agan at 81."whereby to provide the portion 82 which extends substantially parallelto] the wall ofthe casing. Mounted upon the end of the member 82 is thetransverse block 83 positioned ad'acent to the arms 75. The 11 per g endof the lever n3 may be connected by links or in any other desirable andcon.- -'\ZGl1l6llt manner -to thelever arm' 8 orfto the "lepend1ngportion l'lthereoi, as Imay be found most convenicuh the connectionsheing's'uch that upon depression of the die plate 7, the member. 89.,vwill be swung latj orally, therebymovmg the shoes into} contact. withthe shoes 76., The operation of the device in controlling the .currentthrough the lu'iating coil; will thus bets-ubstantially like thatpreviouslydescribed."

" 1 It is contemplated ,that'while the inve'n tion herein shown hasbeenillu strated as ap f pliedto a folding andpressingmachine for usein-the manufacturelot collars and cuffs,"

certain of its broader aspec s might well be embodied in presses ofother types wherein heated pressei' elements are employed.

1 clai nachine for folding and pressing L y and cuti' blanks havingpresser mechitlSill comprising a Dresser element having heat conductingbianl: engaging surface, whereby element may be heated, said mechanism,and with said the means i means for actuating. means operating insynohro'nism actuating mechanism tor controlling hea t supplied topresser element. 2. It. machine for folding and pre collar and cuffblanks comprising presscr means having a heat conducting blank engagingsurface, a heater associated therewith means for produ pressure betweenthe l lc sin -ce and blanlr, an

elements, heating means for the other of between said said elements, andconnections actuating and heatii means noted and arranged to determinethe heat supplied by the latter in direct ratio to the period oi" timeduring which the material is clamped between said elements.

45. A machine of the class described comprising a bed plate constitvnarl; clamping element, a cooperati. g work clamping element movabletoward and from said bed plate, means for supplying heat to said bedplate, means for controlling the heat supplied by heating Queens, andconnections between said movable clamping element and heat controllingmeans so constructed andarrangcd as to increase the supply of heat asthe said movable element is moved toward the bed. plate.

5. A pressing. machine comprising coopcrable work clamping elements,power operated means tor movin one of said elements toward and "ti-omtoe other. electrical means tor heating the other oi? s id elements, aswitch whereby the energir iation oi? said heating i'noans may becontrolled and connections between. said switch and the means tor movingsaid clsniping clement so 0011- strlu-ted and arranged as to decreasethe urplv or h: as said element is moved From the cococratinc; presserelement.

.uachihc oi the class described comprising a bed plate, a die platecoonerable therewith, an electrical heating coil asso- 'n, a dc platemovable toward and from said bed plate, a switch in circuit with saidcoil,

a pneumatic motor for moving said die plate toward the bed plate, apneumatic motor for closing said switch, and manually operable means foradmitting fluids to said motors tor operating them simultaneously.

8. PL pressing machine comprising a bed c having an electrical coil forheating same, a die plate movable toward and the bed plate, a switch forcontrolli the current flow through said coil, a pair oi? cylindershaving pistons therein, means for connecting the pistons to said dieplate and the switch respectively, a cont for pressure fluid havingbranches delixcring into the respective cylinders, and a manuallycontrollable valve for controlling the low fluid in said conduit.

9. A. machine of the class described comprising a presser element, meansfor supplying heat thereto at a normal predetermined rate, and meanscomprising a plurality of rslatively movable elements permitting thesupply of heat at an abnormal rate thereto in proportion to the heatremoved therefrom by the material operated upon.

10. A machine tor folding and pressing collar and cull blanks comprisingcooperable .worl: clamping elements, one of said elements having a heatconducting blank engaging surface, means for moving one of said elementstoward and from the other, means for supplying heat in predeterminedamounts to that one of said elements havthe heat conducting blankengaging surice, and automatic means for increasing the amount of heatsupplied during each approach of said clamping elementsv ll. A machineof the class described comprising cooper-able work clamping elements,means for moving one of said elements t0- ward and from the other, aheating coil associated with oncof said elements, means in circuit withsaid heating coil for limiting the 'tloi'v ot current thcrethrough, andmeans op rable in time with the movement of said worl: clamping elementsinto cooperative relation. for short circuiting said flow limitwherebyto permit increase of ourreactance coil, and means for simultaneouslyclosing said switch and moving said die plate toward the bed plate.

13. In combination with a machine having a bed plate provided withanvelectric heating coil and a pneumatically actuated die plate movabletoward and from said bed plate, a controlling device for regulating theheatin current su lied to said bed plate, said device comprising asupport having a pneumatic cylinder mounted thereon, a piston in saidcylinder, a reactance coil in circuit with the heating coil of the bedplate, a pair of normally separated contact members so constructed andarranged that when brought into contact the reactance coil is shortcircuited, and means whereby movement of the piston serves to bring saidcontact members into enga ement.

14. In combination in a press having a frame, an electrically heatedwork clamping element and a cooperating. pneumatically actuated clampingmember, a. current controller for determining the heat imparted to saidheated element comprising a support having means for attaching it to thepress frame, a normally open switch mounted thereon and arranged to beconnected in circuit with the heating means of the press, a pneumaticcylinder fixed to saidsupport,

for moving said piston in means atoradmitting pressure fluid tOiSELldpiston in the ope", 1

ously with the actuation of saidpneumatically operated clamping member."j

15. In combination in a press having an electrically cooperating movableclamping member, a

pneumatic motor for actuating said movable clamping member, a currentcontroller for determining the heat imparted to said heated elementcomprising a support having a pneumatic cylinder mounted thereon, apisf1 ,45

one direction,"

ton movable in said cylinder, spring means cylinder for moving theposite direction, a switch, comprising a resilientlyeupported circuit,closer, arranged to be included in the heating circuitfor heated workclamping element,a

the press, a member carried by the piston and engageable with saidcircuit closer, upon pressure fluid to the, cylinder,

admission of whereby to close such circuit and means for simultaneouslyadmitting pressurefluid tof the said'member and cylinder.

Signed by me at Troy, New: York, this 23rd day of September 1921.

onviLL E. oooK.

